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Add or Remove GST From Any Amount Instantly

Add or remove GST from any amount instantly, with an automatic CGST/SGST split for intra-state sales or IGST for inter-state sales, plus a ready invoice-style breakdown you can reference directly.

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Add vs. remove, and which one you need

Have a pre-tax price and need the final amount a customer pays? Use Add GST. Have a final price, say from a receipt, and need to work out how much was tax? Use Remove GST. The math runs in opposite directions, which trips people up if they pick the wrong mode.

CGST/SGST vs. IGST, simply put

For a sale within the same state, GST splits evenly between CGST and SGST. Across state lines, the full rate goes as a single IGST charge instead. The total tax rate stays the same either way, just structured differently depending on where buyer and seller sit.

How to Use This Tool

Enter the amount, then choose whether you're adding GST to a base price or extracting GST from a GST-inclusive total.
Select the applicable GST rate.
Choose the supply type — intra-state (which splits into CGST and SGST) or inter-state (IGST).
View the full invoice-style breakdown showing the taxable value, tax split, and final total.

Tips for the Best Results

For intra-state transactions, GST is split equally between CGST and SGST — the calculator handles that split automatically once you select intra-state.
Switching between 'Add GST' and 'Remove GST' modes is useful both for pricing a product upfront and for figuring out the pre-tax base price from a GST-inclusive invoice you've already received.
The invoice-style breakdown table is formatted the same way a real tax invoice would present the numbers, making it easy to cross-check against your own paperwork.

Frequently Asked Questions

What's the difference between Add GST and Remove GST?

Add GST starts from a pre-tax amount and calculates the final price. Remove GST starts from a final price and works backward to find the taxable value.

How is tax split between CGST and SGST decided?

Intra-state transactions split the total GST rate evenly between CGST and SGST. Inter-state charges the full rate as IGST instead.

Which GST rates are supported?

The standard Indian slabs: 5%, 12%, 18%, and 28%.

Can I use this to double-check a supplier's invoice?

Yes, enter the taxable value and rate shown on the invoice and confirm the tax amount matches what was actually charged.

What's the difference between CGST+SGST and IGST?

CGST and SGST apply to intra-state transactions (within the same state) and split the tax between central and state government; IGST applies to inter-state transactions and goes entirely to the central government to be settled between states.

Can I calculate the pre-tax price from a GST-inclusive total?

Yes, switching to 'Remove GST' mode extracts the original taxable value and the GST amount from a total that already includes tax.